Information for Sensor and Index

Formula

General Formula	$(n (1 - 0.25 n) - \frac{RED - 0.125}{1 - RED})$
Specific Formula	$(\frac{2 ({B4}^{2} - {B3}^{2}) + 1.5 B4 + 0.5 B3}{B4 + B3 + 0.5} (1 - 0.25 \frac{2 ({B4}^{2} - {B3}^{2}) + 1.5 B4 + 0.5 B3}{B4 + B3 + 0.5}) - \frac{B3 - 0.125}{1 - B3})$
Calculated	Automatic
Comment

Sensor

Name	Formosat-2
Full Name
Bands	5
Spectrum [nm]	450-900
Spat.Res. [m]	2-8
Inclination	0
Platform
Operator	National Space Organization (NSPO) of the Republic of China (Taiwan)
Date of Launch	2004-05-19
Comment
Usable for Indices	yes
Description

Index

Name	Global Environment Monitoring Index
Abbreviation	GEMI
Formula	$(n (1 - 0.25 n) - \frac{RED - 0.125}{1 - RED})$
Variables	n = ( 2 * ( NIR ^2 - RED ^2) + 1.5 * NIR + 0.5 * RED ) / ( NIR + RED + 0.5 )
Expl. of Variables
Wavelengths	640:760,780:1400
Source	Original formula
Description	Bannari 1996

References

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Index